Collector-ring.



BEST AVAELABLE com PATENTED 00114, 1904.

H. G. REIST. COLLECTOR RING.

APPLICATION FILED MAY 23, 1901.

2 8HEETS-SHEET 1.

N0 MODEL.

PATBNTED OCT. 4, 1904.

G. REIST.

2 SBEETS-SHEET 2.

BEST AVAILABLE COPl H. COLLECTOR RING.

APPLICATION FILED MAY 23, 1901.

no MODEL.

, fiv

P 4 n w An 6 FIgS l-lENRY Gr. REIST, OF SCIllCNECTADY,

BEST AVAlLABLE COPi Patented October 1904.

PATENT Games.

NEW YORK. ASSIGNOR TO GENERAL ELECTRIC COMPANY, A (JOltPORA'llO-N OF NEW YORK.

.COLL'ECTOR-RXNG.

SPECIFICATION forming part of Letters Patent- No. 771,325, dated October 4, 1904.

Application filed May'23, 1901.

To roll whom it 771,161] (mi/(rerun Be it known that I, HENRY Gr. REIST, a citizen of the United States, residing ill-SCliEUQC- tady, in the county of Schenectady and State of New "ork, have invented certain new and useful Improvements. in Collector-Rings, of which the following is a specification.

' This invention relatesto means forsupporting one metal portion of an electrical apparatus operated at highpotential upon another metal portion of the same apparatus in such manner that the two portions shall be effectually insulated from cachet-her electrically. The invention has especial application to collector-rings for alternating-current machines, as illustrated herein, or other machines having moving parts to or from which ourrent is supplied; but its use may be extended to any other electrical apparatus.

In connection with collector-rings, to which the invention has especial reference, it may be stated that the means previous. y employed and disclosed in prior patents .issuedto me, while perfectly satisfactory for the uses for which they were designed, have proved inadequate to properlyinsulate the collector- -rings of .machines operating at considerably higher voltages. Collector-rings supported and insulated in accordance with the disclosure hc'rei'u have been tested at ten thousand volts, and the insulation has stood the test without impairment.

The invention also provides means for avoiding the use of the insulating-rings, which have hitherto been required in multiphase machines between each pair of a plurality of adjacent collecto'rrrings. it was necessary to employ such rings to insulate successive collectorrings from each other, because each ring was loosely mounted on the shell, and then allthe rings were clamped together from the ends of the shell, so as to hold them in proper position thereon. in accordance with this invention each ring is independently held on the shell,

so that the rings are not brought in contact with each other and the necessity for the use of the insulating-ring is avoided, \vith tlie resultthat the structure is well ventilated.

Serial No. 61,517. lllo model) Owing to the independent mounting on each collector-ring and to the peculiar character 5 of each individual insulating support or series of supports for one ring the creepage-surface has been greatly increased, and it is practi cally impossible for any collector-ring to be short-circuited. Themethod adopted for the accomplishing of this result consists in providing the inner periphery of each ring with a plurality of pockets and then fitting in these pockets plugs or arms, which insulate the rings from the shell or main support and which are secured to the shell to prevent movement of the rings thereon;

Of the drawings, Figure 1 is a side elevation, of a single ring with its supporting-arms and main support. Fig. 2 is a section along the 5 line X X of Fig. 1, showing portions of two' collector-rings mounted on the shell or main support. Fig. 3 is a detail of one form of indu idual'insulating support. Fig. 4 is a l l l a l l i l i ring at the joint between two sections thereof, showing one means of securing the two sections or segments of the ring together.' Figs.

5 to 9 are views illustrating steps in the process of making a preferred form of individual insulating-support, and Fig. 10 is a section showing a preferred manner of securing together the abutting ends of the segments of a collector-ring.

In Fig 1, A is a metal shell or support which comprises two segments scoured together by the bolts B and provided with a keyway-K, whereby it may be splincd to theshaft of the machine. The metal collector-ring it is also divided into two segments, the abutting ends 5 of which interlock, as shown in Fig. 1, and are secured together by screws D. This ring is secured in place upon the shell A by means of the annular series of insulating supports manner, as shown at 3, Fig. 1, to prevent relative movement of the shell and collector ring.

As shown in Fig. 2, each of these supports S- has its lower end shaped so as to engage in portions G of the shell A adapted to receive a it. Owing to this manner of supporting each view of the inside periphery of a collector- 7 or arms S, which engage in the shell A in such 9 eesi 1W NLABLE ring independently, as shown in Fig. 2 it will be seen that the necessity for the location of an insulating-ring between two successive collector-rlngs 1S avoided, and as the two rings are entirely separated by alconsiderable space the creepage surfaces are very greatly re duced. Furthermore, each support S is effectively insulated vfrom the collector-ring which .I, of mica or other suitable material, and an insulating-block I, of wdod or a suitable in-v sulating compound. The plug-support S,

provided with asplit collar C for preventing the abrasion of the insulation, is tightly fitted into a pocket P against the insulation I and I. icorrugatedinsulating collar I is located as s own in order to still further increase the creepage-surface. After all the supports or plugs S have been put in place the two segments of the collector-rings are placed upon the shell A, so that the ends of the plugs fit into-grooved portions G of the shell, and the segments are then secured together by the screws D. Each collector-ring is connected in circuits by means of a conductor L, which is mounted in a flange F of the shell, A, with interveninginsulation 1 the lead L engaging at its end in an inner flange F of the collector-ring. I

On Sheet 2 is shown a preferred form of the support or plug S whereby better insulation is provided and in connection with which an improved method of securing the supports to the collector-ring can be carried out. In Fig. 5 is shown the core of the plug, which is provided with a knurled or other irregular surface N and with perforations O,---all 'ofwhich serve .to' prevent the insulating-sheath from slipping off the plug.

In Fig. 6 is illustrated the method of making the insulating covering or sheath for the plug :(shown in Fig. 5) from a suitable number of star or spider shaped pieces of mica M, which are centered with their legs E oil'- set. As shown in Fig. 7 these legs are spun or turned over in order to form an insulating cylinder i open at one end, composed of the legs which break joint with each other and adapted to fit over the knurled lateral surface of the plug. After the cylinder 1 is fitted over the upper end of the plug wire W is wound tightly about it to cooperate with the knurled surface N and the perforations O in' preventing the cylinder from slipping off from the plug. As shown in Fig. 8, the wire winding is covered with suitable soft solder, which is turned off to make a smooth surface 'to fit the interior of the metal cap H, which is formed with a tapered exterior surface T. One advantage of this arrangement over that shown in Fig. 2 will be at once seen to reside in the fact that the top of the plug is better insulated, as there are no joints either in. the insulating-cylinder or the metal cap. A collar I of suitable insulating material is then molded about the lower part of the support S around.

the lower part of the mica insulating-cylinder 1. section'at R in Fig-9 and provided with the pockets P, tapered to fit the tapered exterior surface of the metal cover H, is then heated to expand the pockets, and the plug provided with the cover or cap H, as shown in Fig. 8, is driven into the pocket. When the collectorring cools, the pocket contracts, pressing the The collector-ring, shown in partialmetal .cap H against-the wire W, which in turn presses the insulating-cylinder 1- against the knurled surface N and into the perforations 0, so that the plug is firmly held in the pocket. It will be seen that the mica cylinder 1 provides a very great insulating-surface between the plugS and the metal parts in contact with the collector-ring and that the insulating-collar I, interposed between the collector-ring and the shell A, assists in preventing the possibility of a short circuit between the collector-ring and the shell. As stated above, this device has been tested at ten thousand volts .and has'been found absolutely satisfactory. When each segment of the collector-ring has been provided with its insulating-supports, as above described, collars Q, provided with tapered surfaces U,.as shown in Fig. 10, are screwed upon the ends of the bolt Z to engage in the semi-annular grooves formed in the abutting ends-of the' collector-ring segments and tapered, as shown Y at J, thus securing the segments in place about the shell A.

What I claim as new, and desire to secure by Letters Patent of the United States, is 1. A' collecting device, which comprises a metal support, a collector-ring having pockets around its inside periphery, and separate metal supporting-plugs engaging the support and fitting in and insulated from said pockets.

2. The combination with a collector-ring formed with pockets on its inside periphery,

of metal caps fitting said pocketsmetal sup-.

portingplugs, and insulation surrounding said plugs, over which insulation said caps are 7 3. The combination with a collectorring formed with pockets on its inside periphery, of a shell or support, and plugs engaging in said pockets-and insulated from said ring, said shell being adapted to receive said plugs so as to preventlongitudinal movement of the ring.

4. The combination with'a metal member provided with a pocket, of a metal plug, insulating material around the plug, wire tightly bound around the insulation to hold itin place,

and a metal cap fitting around the wire, said cap fitting the pocket of said member.

5: The combination with a metal member pr'ovidedwith'a pocket, of a metal plug, a plurality of spider-shaped insulating members having their legs relatively offset and sur rounding the plug, and a cap or sheath eroun the insulated members, said cap or sheath litting the pocket in said metal member,

6. An insulating and supporting device, which comprises a plug having an irregular lateralsurface, insulation around said-surface and the top of the plug, wire for binding the insulation tightly against the irregular sides -which comprises a metal of the plug, and a metal cap which fits around the wire and covers the insulated end of the plug.

7, An insulating and supporting device, which comprises-a metal plug, sheet insulation around the sides and one end of the plug, and a protecting metal cap which covers the insu lation at the sides and end of the plug.

8; An insulating and supporting device, plug, insulation around'thesides and one end of the plug, a metalcap which covers the insulation on the end of the plug and a portion of the insulation at the sides, and an insulated ring molded about'the remaining insulation around the.

sides of the plug.

9. An insulating and supporting device,

which around the side and end surfaces of said plug,

comprises a plug, sheet insulation l I l i l l l l l l l l segments and {a wiv-P nu y ahoutsaid insulation and cow: jwl with molten metal.

1G. 'lh combination with the segments of it eolleotonrmg which are formed with grooves at their' almtting ends, of a collar secured in iosition i n said grooves to hold the segments together.

11. The combination with the segments of s eollectonring which are formed with registergrcovc-s at their abutting ends, of a bolt, and a collaz'which is screwed upon said bolt to lie in said grooves and seen re the segments together.

l2. 'lhecomhinat-ion with the segments of a collector-ring which are formed with registering tapered groo-.'cs, of a tapered collar Secured in position in said grooves to hold the segments tog he]: v

'lhecmnhination with the segments of a collector-rim which are formed with re ds-ten ing semi-annular grooves, of a colln 1' which is secured 1Z1 il JSllZlUfl in said grooves to hold the -gethez'. .1

s wlzereoi l have hereunto set my hand this dist day of May, 1901 ll EN ill. G. REKST. Tvitnesses: 

